Work-holding device for multiple-spindle drills



. 1,628 729 May 17 H. v. LUDWICK woax WING nsvrcn FOR MULTIPLE jsrnwu:mums Filed March 10. 1922 4 Sheets-Shoot 1 H j INVENTOR. Vi /525527"yLl/DW/ CK. 7 BY ATTORNEY.

May 17. 1927. 1,628,729

H. v. LUDWICK woax nowm DBvIcEFoR MULTIPLE muons mum Filed March 10.1922 4 Sheets-Sheet 2 I INVENTOR.

HERBERT V. Luowzch.

1,628,729 May 17 1927' H.'v. LLIDWICK WORK HOLDING DEVICE FOR MULTIPLESPINDLE DRILLS Filed March 10. 1922 4 Sheets-Sheet 5 1 INVENTOR.

#598597 I. Luau/or. BY

A TTORNEY.

1927. H. v. LUDWICK WORK HOLDING DEVICE FOR MULTIPLE SPINDLB DRILLS May17 Filed March 10, 1922 4 Sheets-Shoot 4 ll/Hll'll IN VEN TOR.

Patented May 17, 1927.

UNITED STATEs PAili lNT OFF-ICE.

HERBERT V. LUDWICK, PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO BUDID WHEELCOMPANY, PHILADELPHI A, PENNSYLVANIA, ACORPORATION OF PENN- sYLVANIA.

WORK-:HOLDING DEVICE FOR MULTIPLE-SPINDIJE DRILLS.

Application filed March 10, 1922. Serial No. 542,535.

10 base number of holes therethrough, which holes have a) be drilled andcounte wbored- Therear hubs have similar flanges requiring driliing andcountemboring but they also ,liiave, in ma y cases, another fiange whichthe work-holder, taken on the line 22 of Fig. 3. i i i Fig. 3 is avertical, sectional view, taken on theilinc 3- 3 ot Fig. 2. i i i Fig. 4is an enlarged, horizontal view through the pedestal and work-holder,taken on the line 4-4 otFig. 1.

Fig. 5 is an elevational view corresponding to Fig. 1, but showing thework-holder lowered an en, and

Fig. 6 is a etail, sectional view taken on line 66 of Fig. 1.

In the drawingmthe same reference nu merals refer to the same partsthroughout the severalviews and the sectional views are taken looking inthe direction of the arrows [at the ends of the section lines.

In general, my invention comprises a stand or pedestal on which a worksupport is guided for vertical moven'ient. The work support carries thework, 111 this case the flanged hub. Suitable means may be pro- 1 jvidedon the pedestal to limit the upward movement of the work supportiso thatit b tty alwaysbe brought to a definite position wi 11 reference to thedrills. In order to facilitate the introduction of doubleflanged 15interferes wit 1 the seatin of. the hub (in the table of the ordinary dn1 press. The main object of my invention is to provide a ixture ordevice for su porting such flanged [hubs or similar worli in the drillpress,

which fixture is aoplica ble to and l naybe used wit-h either front orrear hubs.

Another object of my invention is to provide a work support for a drillpress which u aybe elevated so as to briugthe workup to thetable of themachine. i

A further object army invention is to provide means for carrying thework such i h D as to permit-work to be inserted n place hubs, or smilar parts nto th s work sup reryreadiiy and quibltly, in a oweredPPSI- Fort, I may make the latter w th a gate at. tion, and elevated tothe wo 'kiug position, he front side which swings open to per-nuttheworkbeingi secureiy claniiied andloclted the work to be positionedwithin the \vorlc iii the "work-holder whenthefllatter is elevatsupport.This can only be done when the ed to the working position. ork-supportin a lowered position and, A ther object (if my invention is to prowhenthe wrnk-support is raised to \VOl'lUllQ' vir e a simpleand efficientwor 'k-hol d iug and posit oiu which can ouly be done when thesupporting mechanisn'rfor use in drill ng or gate iscloserl upon thethtnged hub or other cr uuler boriug flanged hubs or work having work,it is nnposslble to open the gate or similar characteristics. separatethe parts of the work support, so "Further objects, and objectsrelating' to that theworkis necessarily adequately sup- 40 letails iandeconomies of construetion and ported and clamped in f xed position wluleoi'Jei-ation, will definitely appear from the the drills work upon 1t.Any :ulequate detailed description to follow. In one .inlneansn'iay beprovided tor elevating the stance, Iaccornplish the objects of niyinwork support. this case I provide a veiition. by the devicesand meansdescribed screw which is operated by a nutactuated iii the followingspecification. My int enby a suitable hand-wheel. This makes a tiou iscum-1 defined and pointed out in very convenient device for elevatingthe the appended claims. A structure iconstitutwork support but Icontemplate the use of ting a preferred embodiment of my invenequivaleit, means as within the scopeot my ion is illustrated in the accompanyinginvention. a0 drawings, in whichz Referrmg to the numbered parts ot thei Fig. l is a view in front elevation of a drawings, in which I haveshown a prei 1 r i r u naclune en bo(ly1ngmy invention.

ferr ed embodiment of my invention. the Fig.2 isavertical, sectionalView through H P f. my .3 r 1 h stand, it), carries a pedestal; 11, theupper 4H! 1 i t w;

portion of which is formed into a curved, semi-cylindrical wall, 12, asshown in Fig. 4:. This semi-cylindrical wall of the pedestal may bereinforced of strengthened by a plurality of vertically extending ribs,13. The upper end of this wall, 12, supports an annular ledge, 14,having an annular seat, 15, to receive the periphery of the plate, 16,which closes the upper end of the pedestal. This plate or table, 16, hasa central opening, 17, through which the hub may extend, and is providedwith a plurality of openings, 18, arranged equidistant from the centerof the plate and in alinement with the spindles of the drill press. Theplate or table, 16, is removable and may be varied to suit the work andthe number of holes to be drilled or counter-bored. It may be retainedin place in the seat, 15, by means of the removable clamps, 19, whichare secured to the pedestal by means of the bolts, 20. The dowel pin,21, may be used to position the plate with reference to the pedestal, asshown in Fig. 2.

This invention is particularly applicable to multiple spindle drills forboring. or counter-boring a number of holes in a hub flange and, in Fig.1, I have shown several of the drill spindles, 21, of the type used insuch multiple spindle drills. The lower portion of the pedestal, 11, isprovided with a'central boss, 22, in which is journaled a nut, 23, saidnut being rotatable with reference to the. boss, 22, but retained, inany suitable manner, against axial movement with respect to the boss.This nut, 23, is threaded on the screw, 25, and may be actuated by ahand wheel, 24;. The work-supporting member has a base, 26, which is fastoned to the upper end of the screw, 25, for instance, by means of thepin, 27. The work-supporting member has a semi-cylindrical wall, 28,which rises from the edge of the base, 26, and carries a plurality ofkeys, 29, which slide in vertical guide-ways, 30, formed on the insideof the semi-cylindrical wall, 12, of the pedestal. In this manner, thework-supporting member is guided'for vertical movement with respect tothe pedestal. A semi-circular web, 31, extends from the upper edge ofthe semicylindrical wall, 28, and constitutes a part of the top of thework supporting member. The upper surface of this web is finished andinclined to correspond with the flange, A of the hub, A, which, inpractice, rests upon this surface, 32. The web may also be provided witha plurality of openings in. line with the openings, 18, of the plate,16, to permit the passage of the drills. The web, 31, is also providedwith a central notch, 34, fitting the barrel of the hub, A. A gate ishinged to one side of the wall, 28, by the hinge, 35, and comprises asemi-cylindrical wall, 36, corresponding to the semicylindrical wall,28, and a top web, 37, which corresponds to the web, 31. The up persurface of this web, 37, is finished, at 38, to correspond to theflange, A of the hub and is similar to the surface 32 of the fixed web,31. This swinging gate may be locked to the fixed portion of the worksupport by means of a latch, 35.), consisting of a shank, 4.0, journaledin the lug, 4-1, of the gate and terminating in a locking piece, -12,adapted to engage in a groove in the semicylindrical wall, 28, so as tolock the gale to said fixed wall. It will be seen that the work-supportcomprises a substantially hollow, cylindrical chamber having a centralopening in its upper wall, through which the barrel of the hub, A,extends, and having its upper surface surrounding said central openingfinished to correspond with the flange, A of said hub so that the saidflange will lit thereon. The flange, A of the hub. and the greaterportion of the barrel, is housed within the hollow, cylindrical chamberof the work-support. The work-support is raised and lowered by means ofthe screw, 25, and, in its raised position, the upper surface of theflange, A is pressed against the lower surface of the plate or table,16, so that the hub is securely held in position for the drills, passingthrough the openings, 18, of the plate, to bore the required holes inthe flange, A". In order to facilitate the positioning of the hub, A,the work-support is made of two separable pieces, being provided withthe swinging gate, 36. \Vhen the work-support is lowered, the latch, 39,may be manipulated to release the gate and the latter may be swung openso that the hub may be inserted laterally into the work support, to theposition shown in Figs. 2 and 3. The gate may then be swung and lockedin closed position and the hub will be accurately supported in thework-holder, since the surfaces, 32 and 238, thereof will engage theinner surface of the flange, A The work support having been raised bymanipulating the hand-wheel, 24, the portion, A, of the hub, projectsthrough the central opening of the plate and the upper surface of theflange, A is clamped by the work support against the lower surface ofthe drill plate, 16, as previously described.

This work-support may receive either front or rear hubs and supportsthem with equal accuracy for the drilling operation. It is a very simplematter to open the gale, withdraw the finished work and insert new workand the pitch of the screw, 25, is such that the work-support can beelevated to working position very quickly. lVhen the work support is inthe elevated position, the annular ledge, 14, surrounds the upper endthereof, as shown in Fig. 2, and it is impossible for the gate to comeopen so to lllll disturb theseatingof the hub or work during thedrilling operation.

1 am aware that the apparatus, which I have illustrated and describedhere, may be changed considerably without departing from the spirit ofmy inventionand, there fore, I claim my inventionbroadly, as indicatedby the appended claims.

Having thus described my invention, what I claim as new anduseful anddesire to secure by Letters Patent is:

1. In a machine of the class described, the combination of aped-estalhaving one side open, atable supported by said pedestal, a work-holderslidably mounted on said pedestal, adapted to receive the work throughsaid open side, means for clamping the work in said work-holderindependently of said table, said clamping means being releasable whenthe holder is lowered away from the table, and means for moving the workholder toward and away from said table.

2. In a machine of the class described, the combination of a framehaving a work en- 'gaging portion, a work-holder slidably mountedthereon, a gate hinged to said workholder and cooperating therewith toposition and support the work, and means for bodily raising and loweringsaid work-holder in the frame to clamp the work against the workengaging portion of the frame.

3. In a machine of the class described, the combination of a framehaving a work engaging portion, a work-holder slidably mounted thereon,a gate removably connected to said work-holder and cooperating therewithto position and support the work, and means for bodily raising andlowering the work-holder in the frame to clamp the work against the workengaging portion of the frame.

4. In a machine of the class described, the combination of a framehaving a work engaging portion, a work-holder having a semi-cylindricalside Wall slidably mounted thereon, a gate hinged to and forming acontinuation of said wall and forming therewith a hollow chamber inwhich the work is received and supported, andmeans for hodily raisingand lowering said work'holder in the frame to clamp the work against thework engaging portion of the frame.

5. In a machine of the class described, the combination of a framehaving a work engaging portion, a work-holder slidably mounted thereonand comprising a body portion having a top wall shaped to form a seatfor a partof the work to be operated upon and a gate hinged to said bodyportion and also provided with a top wall shaped to form a seat for apart of the work to be operated upon, said body portion and gateforming. in closed position, a hollow chamber receiving and supportingthe work, and

means for raising and lowering saidworkholder in the frame to clamp thework against the work engaging portion of the frame.

6. In a machine of the class described,

the combination of a frame having a work cngiiging portion, awork-holder slidably mounted thereon and comprisin a portion having asemicylindrical side wall and a topwallshaped to form a seat for a partof the work to be operated upon and a gate hinged t9 said side wall andCooperating therewith to form a hollow chamber receiv ing the other partof the work, said. gate having a top wall shaped to form a seat for apart of the work to be operated upon, and means for raising and loweringsaid work-holder in the frame to clamp the work against the workengaging portion of the frame.

7. In a machine of the class described, the combination of a pedestalhaving an open front, a work-holder slidably mounted on said pedestal, agate hinged to said workholder and adapted to be swung open through theopen front of the pedestal to permit insertion of work therein, saidpedestal having a portion connecting the sides thereof above the openfront which engages said gate in the upper position of the workholder toprevent the opening of the gate when the work-holder is raised, andmeans for raising and lowering said work-holder.

8. In a machine of the class described, the combination of a pedestalhaving an open front and a portion connecting the sides of said pedestalabove the open front a table carried by said pedestal and provided witha plurality of openings for the passage of drill spindles, awork-holder, slidably mounted on said pedestal, a gate hinged to saidwork-holder and adapted to swing open through the open front of saidpedestal to permit the insertion of the work, said gate being engaged bythe portion of the pedestal above the open front to prevent the opening1 thereof when the work-holder raised, against said table, and means forraisin and lowerin said work-holder.

9. In a device of the class described. a fixed support, a work holdermovably mounted on said support, a part of said work holder beingmovable relative to another part to permit the positioning of the workon the holder, and means for preventing relative movement of the workholder parts with the work in position thereon, said means beingrendered operative or inoperative through relative movement of theworkholder and the support.

10. In a device of the class described, in combination, a fixed support,a work-holder movably mounted on said support, a gate forming part ofsaid work-holder for securtit) ing the work therein," and means forpreventing opening movement of said gate, said means being renderedoperative and inoperative throng-h relative movement of the work holderand the support.

11. In a device of the class described, in combination, a fixed support,a work-holder .movable with respect to the support to operative orinoperative position, said worksnpport including as part thereof a gate,means to lock said gate in closed position, and additional meansoperative to prevent opening of the gate While the holder is inoperative position.

12. In a device of the class described, in combination, an open-sidedpedestal of substantially semi-circular cross-section having a workengaging portion, and a work-holder adapted to clamp the work againstthe work engaging portion, said \\'ork-holder roniprising twocomplementary walls, one of' said walls being slidably mounted in thecurved portion of said pedestal and having hinged thereto the second ofsaid walls, said latter wall being adapted to swing (mtwardly throughthe open side of said pedestal.

In testimony whereof, I affix n'iv signature.

HERBERT V. LUDWI CK.

